Mobile Image Processing Without the Crash: Building a Practical Android Batch Converter

High-resolution mobile photography reveals a hard limit in app development: the OutOfMemoryError. This case study demonstrates essential memory optimization patterns—image subsampling, stream processing, and async Coroutines—that transform the frustrating technical constraint into a solvable engineering problem. For Android developers managing computational bottlenecks or building creative tools, these techniques are now critical as mobile cameras increasingly become production hardware.